Study of Water Resistance of Fe2O3 Doped P2O5–ZnO–Bi2O3 Sealing Glass System

• Published in: Korean Journal of Metals and Materials Vol. 54; no. 8; pp. 621 - 625
• Main Authors: Ryu, Bong Ki, Hwang, Moon Kyoung, Kim, Il Gu
• Format: Journal Article
• Language: English
• Published: 대한금속·재료학회 01.08.2016
• Subjects: 재료공학
• ISSN: 1738-8228; 2288-8241; 2288-8241
• DOI: 10.3365/KJMM.2016.54.8.621

In order to strengthen the structure of the glass and ultimately improve its water resistance, P2O5– ZnO–Bi2O3 was doped with Fe2O3, which generated Fe ions in the phosphate-based glass. These ions constitute (P2O7) −4 groups within the glass network. Structural analysis using Fourier transfer infrared spectroscopy indicated that P-O-P and Bi-O-P bonds decreased and Fe-O-P bonds increased, as a function of the Fe2O3 level. The thermal property analysis found that the softening point (Ts) and glass transition point (Tg) increased approximately as much as 60 and 105 °C, respectively, and the coefficient of thermal expansion decreased approximately by 25 × 10-7 K-1. The contact angle was measured to quantify the wetting property. The contact angle increased from 42.6° to 64.1° with increasing levels of Fe2O3 at 850 °C. As an indication of water resistance, the weight loss of the 10 mol-% Fe2O3-doped glass was 0.00514 g cm-2, while that of the undoped glass was 0.00710 g cm-2. KCI Citation Count: 7